That is one of the down sides of uploading and storing posted pictures off site. When those sites are taken down, go out of business or are bought the links go away - PhotoBucket is an excellent example. Doing it the wrong way initially cost me tons of hours so please learn from my mistake.
Unless the original poster is still active and had the original pictures he can repost, they are gone. Each of you have a gallery you can use to upload and link to your post here on the site. Notice the Gallery "button" at the top tool bar on the page. If your going to participate consider building a directory with sub categories so that you can find the pictures later, if need be. The number can grow quickly.
Don't know if I have any 68 insulator pictures but will try and remember to look for some.